Die casting machine



Jan. 13, 1942. L. H. MORIN DIE CASTING MACHINE 5 Sheets-Sheet 1 Filed June 19, 1940 INVEN TOR LOU/6 /7 Mom/v BY W ATTORNE s.

Jan. 13, 1942. H. MORIN DIE CASTING MACHINE.

Filed June 19, 1940 5 Sheets-Sheet 3 INVENTOR Lou/s H. Mom/v BY m ATTORNEYJ' 5 Sheets-Sheet 4 Jan. 13, 1942. L. H. MORIN DIE CASTING MACHINE Filed Jl me 19, 1940 Jan. 13, 1942. H, MQRIN 2,269,881

DIE CASTING MACHINE Filed June 19, 1940 5 Sheets-Sheet 5 INVENTOR Lou/a H. Mam/v ATTORN Patented Jan. 13, 1942 UNITED STATE DIE CASTING MACHINE Louis H. Morin, Bronx, N. Y., assignorjby mesne assignments, of one-half to said Louis H. Morin and onehalf toDavis Marinsky, Bronx, N. Y.

Application June 19, 1940,- Serial No. 341,311

9 Claims.

This invention relates to die casting machines wherein heated casting material is pressure injected into the cavities or impressions of dies in forming die castings. More particularly the invention relates to machines of this kind for the simultaneous casting of two objects on independent mounting members; for example in casting the box of a separable end stop of the fastener stringers on one tape and the pin on another tape and.in accurately locatingthe box and pin with respect to end links on the stringer tapes. The novel features of the invention will be best understood from the following description when taken together with the accompanying drawings, in which certain embodiments of the invention are disclosed and in which the separate parts are designated by suitable reference characters in each of the views, and in which:

Fig. 1 is a front elevation of a machine made according to my invention with parts of the construction broken away and with parts shown in section.

Fig, 2 is a vertical sectional view substantially on the broken line 2--2 of Fig. 1.

Fig. 3 is an enlarged sectional view substantially on the broken line 3-3 of Fig. 1, showing only a part of the construction.

Fig. 4 is a plan and sectional view substantially on the line 44 of Fig. 1 with parts of the construction broken away and in section.

Fig. 5 is a partial section on the line 5-5 of Fig. 1 on an enlarged scale.

Fig. 6 is a sectional plan view substantially on the line G--6-of Fig. 2 showing only a partof the construction. I

Fig. '7 is an exploded perspective view illustrating the dies and core employed in forming the dual castings.

Fig. 8 is a detail plan iew showing the castings as formed upon end of independent stringer tapes. p

Fig. 91s a view similar, to Fig. '7 showing a slightly different form of end stop construction; and v Fig. 10 is a view similar to Figs. 8 and 9 showing another adaptation of the invention.

pin structures herein disclosed, are simultaneously cast in proper relationship upon spaced tapes so that in a single operation, what are commonly referred to as detachably coupled end stops involving the box and pin are formed in a single operation. It will thus be seen that in addition to producing great accuracy in the resulting stringers, the operation in question is materially simplified and economizedby reason of the saving in handling of pre-formed parts which are later attached to the stringers. Still further, by virtue of my improved construction, a more secure attachment of .the pin and box parts is provided in that the die cast material extends into the interstices of the braid of the tape which securely anchors and retains the same against displacement from the tapes.

In Fig. 1 of the accompanying drawings, I have indicated at l2 a part of the base of the machine upon which are arranged two upstanding bearing plates [3 and H. In the plates l3 and I4 is arranged a horizontal drive shaft l5 driven by a chain 16 from a motor shaft, not shown. The motor chain l6 passes around a sprocket l'l -having a clutch portion IS in connection with which a clutch l9 operates in transmitting the In the construction of end stops for the stringers or separable fasteners, it has been customary to form the end stops from sheet metal or from die cast bodies independent of the stringer tapes, and then to press, crimp, or otherwise apply the same to the tapes. It is the purpose of my present invention to provide a die casting machine wherein the end stops or two different end stop structures, such as the box and chine.

drive. to the shaft IS. The clutch I9 is moved into' operative position by, a foot treadle 20, note Fig 1, the connecting rod 2| of which is coupled with one end of a lever 22 pivoted to a bracket 23 as seen at 24.

Another companion lever 22a is also pivoted as at 24. The lever 22 has a yoke arm 25 having pins 26 operating in grooves Ha of the clutch IS. The levers 22 and 22a abut as seen at 22b, note Fig. 1, so that the depression of the treadle 20 will throw the clutch I9 into operative position. However, upon the release of the treadle, the lever 22a will hold the clutch and the treadle inoperative position. At the end of th lever 22a.

depressing the lever 22a. Adjustable nuts 32 are provided on the link rod 30 to regulate the tension of the spring 3|. At this time it might be well to mention that the present machine may be said to be a single cycle operating ma- In other words, the machine passes through one cycle of operation in forming a casting and then stops for the replacement of dies preparatory for the next cycle of operation,

4 as will more fully hereinafter appear.

On the shaft l5 adjacent the cam 29 is another cam 33 for actuating the shield or guard 34, later described. At the other end of the shaft l5 outwardly of the frame I4 is a cam 35 for actuating a plunger 36 controlling the supply of air to the plunger of the ejector cylinder 31 for injecting casting material under pressure into the dies.

. At 38 is shown another cam operating a rocker arm 39 controlling the piston or air valve 48 regulating the supply of air to a cylinder 4| which actuates a gripper block "retaining upper and lower dies 43 and 44 in firm engagement with each other in the operation of injecting the dies supported in said block.

wardly or. towards the left in Fig. 2, so that it will engage a pawl or latch 61 and depress it against the action of a spring 68. This latch normally holds the dies against the plate 58, but

when depressed, as by the pin 66, the dies may be removed and replaced. A finger piece 69 is provided on the pawl to manually operate the same as and when desired. The pawl 61 is pivotally supported in a recessed portion of the block 48 as seen at 19. I

The dies 43 and 44 have registering recesses and cavities to form on spaced tapes 1| and 12 a die cast pin part 13 and box part 14 united in a common gate 15 as will appear in Fig. 8 of the drawings. The pin 13 and box part 14 are formed adjacent end links 16 and 11 on the tapes II and 12. The'pin part 13 has a partially formed link 18a at its end. The pin and box parts form the members of what is termed a separable fastener so that when the castings are trimmed and the wishbone gate portion 15 removed, the pin 13 will be insertable into the box 14 in coupling the stringer tapes 1| and 12 of a conventional separable fastener. a

In view of the fact that the dies 43 and 44 will have substantially similar impression recesses or Arranged in the cylinder 4| is an air actuated piston 52, the connecting rod- 53 of which passes through the bracket 46 and has a crosshead 54 adjustably supported thereon. A spring 65 is employed to move the crosshead 54 and piston 52 upwardly to normally support the gripper block 42 in raised and inoperative position, permitting free insertion and removal of the dies 43, 44-. However, upon the admission of air to the cylinder 4| through-the pipe 56 coming from the valve 49, note Fig. 2, the gripper block 42 will be moved into and held in firm engagement with the dies. This engagement is'a yieldable engagement controlled through the'spring 55,

thus compensating for any slightirregularities which mayprevail, or for the presenceof any foreign material which may be present between the block 42 and the upper die.

The crosshead 54 is coupled with the gripper block 42 through rods 51 which are slidable in the die block 48, as will be apparent. The die block 48 is bolted to a mounting plate 58 which in turn is bolted to the front faces of the upstanding bearing plates l3 and l4, as will clearly appear upon the consideration of Figs. 1 and 4 of the drawings. The upper end of the block 48 at opposite sides of the die receiving recess or aperture 49 is provided with forwardly directed guide lugs 59 which aid in guiding the dies in position. At 60 is shown a die ejector lever mounted upon the lower end of an ejector pin 6] having on its upper surface a cam or eccentric pin part 82 for en aging a recessed ortion 83on the l wer surface of the lower die- 44; so that the dies may be moved outwardly (to the left in Fi 9.) by the rotation of the lever 68 after the.

blo k 42 has been raised. On the pin. 6| is a spring 64 for normally returning the lever 60 includ ng the pin 8| to the, normal or neutral position (shown in Fi s. 1. 2. 4. and 6) when the lever is released. The pin 6| has a groove 65 receiving a pin 68' when the parts are inthe position shown for example in Fig.2. When,

' groove. 65 act as a cam to force the pin 66 outcavities, the showing of these recesses and cavities on the one die part 44 will be suflicient to thoroughly understand the invention. At each side of the die part are formed recesses-18 and 19 for receiving the tapes H; 12. Pins 86 are employed at the beaded edge portion of the tape,

to securely retain the tape in position in the recesses 18 and 19 and in proper alinement in the cavity portions 8|, 82 which form the pin parts of both members 13, 14. The cavity 82 opens into thebox-shaped cavity 83 which forms the enlarged box part 14 as will be apparent;

Other recesses 8|a, 82a are provided to receive the end links of the tape. The gate passages are indicated at 84 which form the wishbone gate construction 15, the main admission port 85 opening through plates 86 secured to the inner surfaces of both die parts.

At 81 is shown a core part having an aperturedhandle portion 88, the core portion having a part 89 which forms the pin-receiving core of the box part 14 as will be apparent. On the core 81 is also arranged 'a control block 90 which cooperj 3 sites with a micro switch element 9| in circuit with the solenoid valve 92 throughlwiresw93, the

solenoid controlling the valve 94 in air pipe, later described, which controls the supply of air to the ejector. cylinder 31. This structure is shown in Fig. 1 and diagrammatically illustrated in Fig. 2. It will thus be seen that if the dies are not properly located in .the machine, or if the core 88 should inadvertently be omitted, then the micro switch 9| will not be actuated and the solenoid valve will stay closed, thus preventing air from being transmitted to the ejector cylinder 31. preventing the discharge of casting material through the nozzle, later described. Howenergizing the solenoid 92, moving the valve 94 into open position as diagrammatically indicated in Fig. 1 of the drawings. The lbwerdie 44 has an elongated handle portion which the entire die, unit comprising the dies 43,

44a by means of 44 and-the ccre 81 may be'inserted into and removed from the machine.

Q At this time it will be well to point out that in however. the pin 6| is-rotated, the walls of the,

the operation of the machine, it is intended that tapes.

upon the upstanding walls 95 at the inner ends a conveyor or other'means to a position adjacent the machine, and an operator will remove one unit, insert it into the machine, form the casting, then remove the unit and place it on another conveyor delivering the unit with the casting therein to another point where the dies will be separated, the core removed and the casting trimmed, etc. Thus by employing a number of these die units, the assemblage of the tapes in the die units may be performed well in advance of the casting stage so as to provide a con-' and other pins 800 are preferably employed to,

engage the tapes adjacent the outer corner portions thereof in maintaining the alinement of the tapes in the recesses 18, 19 and the portions of the impressions receiving the beaded edges of the The straight ends of the tapes arealined of the recesses 18, 19. If desired, spring fingers 96 may be employed to retain the tapes against accidental displacement in the operation of placing the die 43 upon the die 44. Die alinement pins 91 are provided to firmly maintain the dies in coupled relationship in the handling thereof prior to insertion into the machine. I

Adjustably mounted in the upper corner portions of the frames I3 and I4 are pivot pins 98 in connection with which is supported the melting pot and gooseneck construction 99. The bracket portion I of the gooseneck 99 has a forked upper end forming the terminal bearings I0 I for the pivot pin 98 so that the discharge nozzle I02 may be properly alined with the' gate passage of the dies; that is to say, with respect to lateral adjustment. The bracket portion I00 has at its inner end a cylindrical bearing I03 having laterally extending arms I04 in connection with which are supported vertical rods I05,

on the upper end of which is supported the crosshead portion 310. of the cylinder 31.

At I06 is shown the air pipe delivering air from the cylinder I01 controlled by the plunger valve 36 to operate the plunger rod I08, which extends into the gooseneck 99, to pressure discharge casting material through th nozzle'I02, as in other die casting machines of this general type and kind. It will be understood that the valve 94 controls this transmission of air in the manner previously described. No specific showing is made 01' the goosene'ck construction as this in itself forms no direct part of the present invention. It is suflicient here to refer to such a gooseneck construction as is shown in Patent No. 2,145,553, dated Jan. 31, 1939.

Springs I09 are coupled with the crosshead portion 31a and extend rearwardly in the manner indicated diagrammatically in Fig. 3 of the drawings to normally swing the gooseneck for- Wardly to support the nozzle I02 in firm engagement with the dies.

At the upper portion of the bearing plates I3 and I4 is a shaft IIO. Arranged upon this shaft within the bearing plate I3 is a bushing II I on one end of which is secured an arm I I2. Supported in the arm H2 is an adjustable screw II3 coupling the arm II2 with the bracket I00 as as seen at I I4. On the bushing I II outwardly of the frame I3 is a long arm II5 carrying at its free end a roller II6 operating upon the surface of the cam 29 in controlling the position of the nozzle I02 with respect to the dies. It is understood that the cam 29 will have a surface which will permit the spring I09 to firmly support the nozzle I02 luengagement with the dies at the moment of pressure injecting the casting materialinto the dies, whereas during the remainder of the cycle, the cam will freely support the nozzle out of pressure engagement with the dies.

The guard plate 34 is in the form of a large rectangular frame supporting a transparent panel 34a of shatterproof glass which is disposed in front of the dies during the operation of the machine, and particularly the operation of the pressure injection of the casting material into th dies. This guard is supported by a central arm 34b clamped to the shaft IIO. On one end of the shaft H0 is keyed a lever I", to the end H8 of which is coupled a spring II9. Coupled to the other end I of the lever H1 is a connecting rod I 2I which is pivoted as seen at I 22 to a lever I23 pivoted as seen at I24 to the frame I3, the lever carrying at its free end a roller I25 which operates upon the cam 33 as clearly indicated in Fig. 3 of the drawings. the sprin II9 supports the roller I25 in engagement with the cam 33, and the cam supports the guard 34 in the full-line position shown in Fig.3 for a part of the cycle of operation of the machine and then swings the guard into raised position as indicated in dotted lines, permitting the free insertion and removal of the dies as will be apparent.

The shaft IIO has a sliding movement in its supports and a spring I26 is arranged upon one end of the shaft to normally support a key member I21 in engagement with a key plate I28 at the other end of the shaft, 'so that when the machine-is not in operation, the guard 34 may be raised and lowered by' hand and supported in the different positions by the key member I21 as will be apparent.

Means is shown at I29 for detachably mounting the gooseneck 99 in th pot proper 99a for repair or replacement of the gooseneck. The air .supply to the valve 40 or the cylinder 40:; in

which the valve operates is introduced through the pipe 40b. It will be understood that the cam '38 will be so timed with respect to the other mechanisms of the machine so as to move the gripper block 42 into operative position supporting thedies in such position during the moment of pressure injecting the casting material into the impression of the dies. In like manner, the cam 35 will function to operate the valve 36 to supply air to the cylinder 31, air being admitted into the casing I01 through the pipe I06I06a. It will be understood that the machine will be provided with a means for supplying compressed air to both of the pipes b and I06a.

The internal cam surface 28'has an offset 20a,

' note Fig. 3 of the drawings, into which the roller andis engaged by an annular surface 28 of the cam so as to support the clutch in operative en gagement after the foot has been removedjfxom In other words,

eration of the machine is stopped insofar as the- 5 performance of the several functions heretofore described are concerned.

In Fig. 9 of the drawings is shown another adaptation of the invention which modifies the structure of the pin and box as shown in Fig. 8. 10

in forming integral die cast flanges I30 on pin parts 13a and box parts 14a, the flanges having apertures I3l therein as in other devices of this kind. In other words, the dies used in forming the devices as seen in Fig. 9 of the drawings will 15 be so'modified in contour as to form the apertured flanges as will be apparent.

In Fig. 10 of the drawings is shown a' further adaptationof the invention wherein the pin part 13b and the box part 14b are cast directly upon sheet metal flanges I32 which are first secured to the tape, after which the casting is formed on the tape and said flanges. The sheet metal flanges I32 are also apertured as seen at I33 to receive fastening devices in attaching the tapes to a suitable support. Here again with this construction the dies will be made to receive the tapes including the flange I32 secured thereon, otherwise the. castings will be formed as illustrated inFig. 8 of the drawings. flanges substantially of the type and kind here in question are disclosed more fully in Patent No. 2,172,231 dated Sept. 5, 1939.

In the use of the machine, the assembled dies 43, 44 with the core 81 therein and with the tapes supported in position in the recesses and cavities of the dies are first inserted into th die receiving recess or aperture of the block 48 and are moved backwardly over the pawl 61 which is depressed in this operation until the dies strike the plate 58'. At this time the pawl 61 moves upwardly by the spring 68 and retains the dies against accidental displacement. The proper positioning of thedies and core in the machine will cause the block 90 to actuate the switch 9|.

Thereupon the treadle 20 may be depressed to throw the clutch l9 into operative position starting the cycle of operation of the machine. ing this cycle the clutch is'held in position by the cam 28 as previously stated, and during the cycle of operation the guard panel 34 is first moved downwardly in front of the dies to the full line position shown in Fig. 3; .the gripper block 42 having been moved into position to firmly support th through the actuation of the cam 38 and valve 40 controlling admission of air to the cylinder 4l while the dies are held in this firm engagement.

The roller H6 operating upon the cam 29 re- 00 leases the gooseneck sufiicientlyto allow the nozzle I02 to be held infirm engagement with-the dies through the spring I09, after @hich' the heated casting material is pressure injected into the die cafvitiesby the timely admission of air into the cylinder il. The air supply is controlled through the cam 35 operating the plunger valve 38. After the casting has been formed, the

pressure of the nozzle I02 ori't'hedies is released by thecam 29, the block 42 is raised by the spring- 70 U5, and the guard panel 34 is swung intothe dotted line position shown in Fig. 3, and the clutch It has been moved into. inoperative position and the machine is. again at rest. The operator now swings the hand lever 60 from right Sheet metal 30 Dur- 1 dies in engagement with each other 55 complete die unit including the core 86 is then removed from the machine and another assembled die immediately inserted into the machine, and the above operation repeated.

The-first dies with the castings formed therein are then separated, leaving the castings on the core 81, after which the cast box part 14 'is stripped from the core, producing the result seen in Fig. 8 of the drawings. Thereafter the dual castings are trimmed to remove any flare of metal that may prevail and further to remove the gate 15.

It will of course be apparent that the machine as herein shown and described is for the purpose of illustrating one adaptation and use of the invention. It will be apparent, however, that the particular type and kind 01 dies employed, including the core member or members, may be altered in the production of different types and kinds of castings, and particularly wherein it is essential and desirable to arrange some type or kind of member or members in the dies upon -which one or more castings are formed. In

have been formed, and the replacement of other dies in the machine.

It will of course be understood that in forming die castings in the successive die units inserted into the machine, these units may have different impressions or cavities in producing different devices. In other words, the size of the dies will be standardized with a standardized di'e supporting block within the limitations governed only by the size of the casting or castings formed. In

fact, in some cases even smaller die units may be employed by including shims or other spacing members in the stationary supporting block for proper alinement or centralization of the dies. It'will also be apparent that my invention is by no means limited to the formation of dual cast- .ings, as individual castings may be formed, or

in fact, multiple castings may be formed. In all instances it will be preferred to employ the handle member on at least one of the die parts of a unit to facilitatequick and easy handling thereof and to provide a degree ofinsulation against the heat of the dies.

Having fully described my invention,- what I claim as new and desire to secure by Letters Patent, is:

1. A die casting machine of the class described comprising a stationary block'having a recess opening through one edge and one side thereof in which assembled-dies are detachablyand slidably arranged for insertion and removal through said side of the block, a movable gripper block arranged at said edge of the stationary block. automatically actuated means for moving the "gripper block into engagement with assembled dies supported in said stationary block, means for pressure injecting heated casting material into the dies while firmly supported by said gripper block, and means partially ejecting the asembled dies with the casting therein through the open side of the stationary block upon releasing the gripper block from said dies to facilitate free removal of the dies from the machine.

2. A die casting machine of the class described comprising a stationary block having a recess opening through one edge and one side thereof in which assembled dies are detachably and slidably arranged for insertion and removal through said side of the block, a movable gripper block arranged at said edge of the stationary block, means for moving the gripper block into engagement with assembled dies supported in said stationary block, means for pressure injecting heated casting material into the dies while firmly supported by said gripper block, means partially ejecting the assembled dies with the casting therein through the open side of the stationary block upon releasing the gripper block from said dies to facilitate free removal of the dies from the machine, and automatically actuated air valves controlling the operation of said gripper block and the injection of casting material into I the dies.

3. A die casting machine of the class described comprising a stationary block having a recess opening through one edge and one side thereof in which assembled dies are detachably and slidably arranged for insertion and removal through said side of the block, a movable gripper block arranged at said edge of the stationary block, means for moving the gripper block into engagement with assembled dies supported in said stationary block, means for pressure injecting heated casting material into the dies while firmly supported by said gripper block, and means partially ejecting the assembled dies with the casting therein through the open side of the stationary block upon releasing the gripper block from said dies to facilitate free removal of the dies from the machine, automatically actuated air valves controlling the operation of said gripper block and the injection of casting material into the dies, and means comprising a micro-switch actuated by the assembled dies controlling the supply of air to the means pressure injecting casting material into the dies.

4. In a die casting machine of the class described, a fixed die block, a movable die block disposed in edge to edge relationship with the fixed die block, the edge of the fixed die block adjacent the corresponding edge of the movable die block having a channel therein opening outwardly through one side surface of said die block, a pair of assembled dies collectively insertable into the channel of said fixed die block and held firmly in said channel by vise-like action between said stationary and movable die blocks in the operation of pressure injecting heated casting material into said dies, automatically actuated means for moving the movable die block into engagement with said dies, means comprising a micro-switch actuated by the assembled dies controlling the pressure injection of heated casting material into the dies, and means forcibly ejecting the dies with a formed casting therein from the channel of the stationary die block to provide free removal of the dies from the machine.

5. In a die casting machine of the class described, a pair of dies having independent cavities with a common gate opening into said cavities along the parting line of the dies, means supporting independent mounting members between adjacent surfaces of the dies and in spaced relation to each other, one mounting member extending into one only of said cavities and the other mounting member extending into the other of said cavities whereby in the pressure injection of heated casting material into the die cavities two castings are simultaneously formed, one on each of said mounting members and joined only by the gate portion of the resulting casting.

6. In a die casting machine of the class described, a pair of dies having independent cavities with a common gate opening into said cavities along the parting line of the dies, means supporting independent mounting members between adjacent surfaces of the dies and in spaced relation to each other, one mounting member extending into one only of said cavities and the other mounting member extending into the otherof said cavities whereby in the pressure injection of heated casting material into the die cavities two castings are simultaneously formed, one on each of said mounting members and joined only by the gate portion of the resulting casting, and a core arranged between adjacent surfaces of the dies and extending into one of the cavities.

7. In a die casting machine, a pair of dies between which the end portion of a stringer tape, including end links thereon, is adapted to be arranged, means on the dies engaging the tape and end links for keying and locating said end portion of the tape between the dies, the dies having a, mold cavity in which a part of said end portion of the tape is exposed, means for locating and firmly supporting the dies in engagement with each other in the machine, and means for pressure injecting casting material into the mold cavity of the die in forming a die casting directly upon the tape adjacent and in predetermined spaced relation to the end link of said tape.

8. In a die casting machine, a pair of dies between which the end portion of a stringer tape, including end links thereon, is adapted to be arranged, means on the dies engaging the tape and end links for keying and locating said end portion of the tape between the dies, the dies having a mold cavity in which a part of said end portion of the tape is exposed, means for locating and firmly supporting the dies in engagement with each other in the machine, means for pressure injecting casting material into the mold cavity of the die in forming a die casting directly upon the tape adjacent and in predetermined spaced relation to the end link of said tape,

and a core arranged on the parting line of the dies and including a part extending into said cavity and upon which the casting is formed to produce in the resulting casting a core passage arranged outwardly of said tape.

9. In a die casting machine, a fixed die block, another die block movable toward and from the fixed die block, means keying and alimng a pair of dies between adjacent surfaces of said fixed and movable die blocks, spring actuated means cooperating with the dies retaining said dies against accidental displacement from the die blocks, means for pressure injecting heated casting materials into the dies when firmly supported between said die blocks, means partially ejecting the dies with the casting therein, and said last named means automatically moving said die retaining means into inoperative position.

LOUIS H. MORIN. 

